Machine for expanding and trimming tubes



2 Sheets-Sheet 1.

' (No Model.)

J. ANDERSEN.

MACHINE FOREXPANDING AND TRIMMING TUBES.

No. 394.548. Patented Dec. 18, 1888.

Tm/617207". 762M WzZnesse-s.

(No Model.) 2 Sheets-Sheet 2.

J. ANDERSEN.

MACHINE FOB. EXPANDING AND TRIMMING TUBES.

No. 394,548 Patented Dec. 18 1888. 1'19. 5

W Ewen/Z02".

N. PETERS. MID-WNW, Washington. n1-

UNITED STATES PATENT OFFICE.

JACOB ANDERSEN, OF LONG ISLAND (ITY, NEIV YORK.

MACHINE FOR EXPANDING AND TRIMMING TUBES.

SPECIFICATION forming part of Letters Patent No. 394,548, dated December 18, 1888.

Application filed June 8, 1888- Serial No. 276,484. (No model.)

To aZZ whom it may concern:

Be it known that I, JACOB ANDERSEN, a subject of the King of Norway, and a resident of Long Island City, in the county of Queers and State of New York, have invented certain new and useful Improvements in Machines for Trimming and Expanding Tubes, of which the following is a specification.

My invention relates to those machines by which the ends of tubes are expanded and trimmed, having previously been placed in holes drilled or punched in tube-sheets of boilers and similar objects; and the object of my invention is to arrange and construct the parts of the machine in such a manner as to save time and power in using the same.

In the accompanying drawings, Figure 1 is a front view of my machine. Fig. 2 is a rear view of the same. Fig. 3 is a longitudinal section, and Figs. 4 and 5 are details of the machine.

The same letters refer to the same parts throughout.

In the handle A are mounted parallel to each other two shafts, B and C, and made to revolve freely therein. The shaft C has secured to it two cams, C and C and also a spring-lever, D, ending in a pawl, which engages with the teeth on the ratchet-wheel E,

the latter revolving loosely around the shaft C. Three other disks, F, I, and K, which also turn loosely around shaft U, serve partly as guide blocks for the pins rand heads 7" of the expanding rollers R, which slide in slots provided therein, and partly as distance-pieces. A cog-wheel, G, is arranged between the disk K and wheel E, turning freely on shaft 0, and engaging with another, G, secured on shaft B. The cup-shaped disk I carries also the cutters L for trimming the ends of the tubes.

The cams C and (l are triple cams, as shown in Figs. 1 and 3. Generally three expansionrollers R are used. Each roller R is formed of the main shank 4 two trunnions, 'r, and two heads, r, as shown in Fig. 3.

The three sections of the cams C act each upon a trunnion, '1', of one of the pressure-rollers R, while the latter are brought up against the inner surface of the tube to be treated by turning the shaft C by means of a handle, C the spring-catch D then sliding over the teeth of the wheel E.

All the loose disks F I K and the wheels G and E are firmly joined by means of three stay-bolts, S, and nuts S, which pass through each of the disks and wheels just mentioned at places where they do not interfere with the rollers R or the cams C C".

If the cog-wheel G is turned in the proper dll'BCtlOlP-flOHl the right to the leftall these parts will revolve together, as will also the shaft C, with the cams C C and the spring catch D, the latter being acted upon by the teeth of the wheel E.

To the shaft B is secured on the side opposite to the wheel G the toothed wheel M, which can be turned in either direction by means of the double pawl N and the pawllever N, similar to those in use at present.

The cylindrical part of the handle A is flattened at A the greater part of its length, and an adjustable arm, 0, is fitted to slide thereon, and secured by means of the set-screw P in any desired position corresponding to the distance between the centers of two adjoining tubes. The flattening A is applied in such a manner that the arm 0 will lie parallel to the shaft C and be on the same side of the v handle A that the expansion-head is located, so that when the latter is placed in one tube the arm 0 will reach into the adjoining one and prevent the entire apparatus from turning while the pawl-lever N is operated.

The application of my machine is then as follows: The arm 0 having been adjusted to the proper distance, the expansion-head is placed in one tube end, while the arm 0 is passed into the adjoining one. The shaft 0 is now turned, by means of the handle C until the rollers R press firmly against the tube. The entire head is then turned by means of the lever N, wheels M, G, and G, and shaft B and spring-catch D, expanding the tube, these operations of C and N being repeated alternately until the desired expansion is completed, when the pawl N is reversed, and with it all of' the other motions, relieving the pressure and allowing the withdrawal of the head of the machine. The trimming-cutters L can be set by means of the screws L, and both operations-expanding and trimming-can be completed at the same time when desired.

The entire operation can be performed by turning an ordinary crank slipped 011 the square end B of the shaft B, removing in this case the pawl-lever N. feed-crank C should be reduced in this case.

Having thus described the nature and uses of my invention, I claim- 1. In a machine for expanding and trimming boiler-tubes, the shaft 0, having the cams O C and handle C in combination with the rollers R, disks F and I, and handle A, as and for the purposes herein shown and cleseribed. v

2. In a machine for expanding and trimming boiler-tubes, the cup-shaped disk I, having the cutters L, in combination with the bolts S, rollers R, and gear G, substantially as The pressure on York and State of New York, this 6th day of 25 June, A. D. 1888. h

, JACOB ANDERSEN.

lVit-n esses:

L PATTI, AUGUST 0. CHRISTENSEN.

C in combination with 20 

